The pair were reunited after McCartney, who recently spoke out against reality television shows, was a guest on the comedian's spoof show Britain's Got Pop, in front of an audience which included Marie Helvin, Lulu and Kate Moss.

Sir Paul gave advice to Geraldine, who, viewers were told, had once been a male piano player on a ferry.

McCartney arrived with a glamorous looking Nancy Shevell, who wore a silky minidress and knee high boots.

Recently the Beatle broke his silence about his relationship with the American businesswoman.

Macca attended the bash with American girlfriend Nancy Shevell

'I just like being in love,' he told the Sunday Times.

And Mrs Shevell – an American businesswoman who's amicably separated from her husband – says she isn't stressed by his mega-fame.

'I'm a cancer survivor, I run a trucking company and I've got a 16-year-old to raise. That's stress.'

Meanwhile Sir Paul made his stance on reality television clear, as he likened it to a car crash, but admitted he watched it.

Still swinging: Scottish diva Lulu and former model Marie Helvin joined old pal McCartney

The ex-Beatle claimed shows like the X Factor did not encourage musical creativity.

Sir Paul, 66, said: 'I think there is too much of it. You can't turn on the telly without somebody being judged by four people, whether they are on ice, or on the stage or in the jungle.

'I'm not very keen on it.

'I watch it like everybody. It's compulsive viewing but so is a traffic accident. It doesn't encourage creativity.'